Adjustable brace



July 27, 1954 a. 'HILLQBERG ADJUSTABLE BRACE s Sheets-Sheet 1 Filed May20, 1952' July 27, 1954 B. HILLBERG ADJUSTABLE BRACE 5 Sheets-Sheet 2Filed May 20, 1952 July 27, 1954 B. HILLBERG ADJUSTABLE BRACE 3Sheets-Sheet 3 Filed May 20, 1952 Patented July 27, 1954 ADJUSTABLEBRACE Bror Hillberg,

Chicago, Ill., assignor to Superior Concrete Accessories, Inc, Chicago,111., a corporation of Illinois Application May 20, 1952, Serial No.288,839

The present invention relates generally to adjustable braces. Moreparticularly the invention relates to that type of brace which isadapted for use in connection with the construction of a concretebuilding, serves, after a wall slab is placed neXt to a floor slab by acrane or like hoisting mechanism, to hold the wall slab in positionwhile it is being secured in place, consists of a bracket with means fordetachably securing it to the inner surface of the wall slab, a bracketwith means for detachably securing it to the top surface of the floorslab, and a straight inclined or diagonally disposed strut between thetwo brackets, and has means whereby it may be longitudinally adjusted inorder that the wall slab may be tilted outwards or inwards into anydesired angular position with respect to the floor slab as a preliminaryto securing it in place.

In connection with construction of a concrete building it is now commonpractice at the site of the building to form on the usual fill at thesite a rectangular horizontally extending frame, then to pour concreteinto the bottom portion of the frame interior for floor slab formingpurposes, then to overlie the poured concrete with a film or layer ofncnadhesive material, and finally to pour concrete into the upperportion of the frame interior for wall slab forming purposes. Afterhardening or setting of the concrete and removal of the mold formingframe the concrete wall slab is swung upwards and manipulated into anupstanding position next to one edge of the fioor slab. After properpositioning of the wall slab the latter is suitably secured in place.The aforementioned practice or technique is inexpensive but requires theuse of a brace of the aforementioned type in order to hold the wall slabin the desired angular position with respect to the floor slab while itis being secured in place.

One object of this invention is to provide an adjustable brace of thetype under consideration which is an improvement upon, and has certaininherent advantages over, previously designed or proposed braces for thesame purpose and is characterized by high efficiency and strength,facility of longitudinal adjustment and low cost of fabrication.

Another object of the invention is to provide an adjustable brace of theaforementioned type in which the wall slab engaging bracket is of simpleand novel design and is connected to the upper end of the strut by ahorizontal pivot element in order that it and the strut are capable oftilting relatively to one another in a vertical plane.

Another object of the invention is to provide 8 Claims. (Cl. 248354) anadjustable brace of the type under consideration in which the floor slabengaging bracket consists of a bottom member, a pair of spaced apartupwardly inclined side members at opposite sides of the bottom member,and a tiltable collar between the upper ends of the side members, andthe means for efiecting longitudinal adjustment of the brace consistsof 1) an elongated externally threaded element which is connected to thelower end of the strut, extends slidably through the tiltable collar andis in parallel relation with the strut, and (2) two wing nuts which aremounted rotatably on the elongated externally threaded element, arepositioned at opposite sides of the collar and are so arranged that whenthe uppermost nut is tightened, after loosening of the lowermost nut, itcauses the strut to slide upwards and effect outward tilting of the wallslab and when the lowermost nut is tightened, after loosening of theuppermost nut, it causes the strut to slide downwards and elfect inwardtilting of the wall slab.

A further object of the invention is to provide an adjustable brace ofthe type and character under consideration in which the strut is soconstructed that it possesses great durability and strength and theupper end of the elongated externally threaded element is connected tothe lower end of the strut in a novel and simple manner.

A still further object of the invention is to provide an adjustablebrace which is generally of new and improved construction andeffectively and eflicicntly fulfills its intended purpose.

Other objects of the invention and the various advantages andcharacteristics of the present brace will be apparent from aconsideration of the following detailed description.

The invention consists in the several novel fea tures which arehereinafter set forth and are more particularly defined by claims at theconclusion hereof.

In the drawings which accompany and form a part of this specification ordisclosure and in which like numerals of reference denote correspondingparts throughout the several views:

Figure 1 is a perspective showing an adjustable brace embodying theinvention in operative relation with a concrete wall slab and a concretefloor slab after placement of the wall slab next to the floor slab by anoverhead crane;

Figure 2 is a fragmentary side elevation of the brace, the floor slabengaging bracket of the brace P being shown in section for illustrativepurposes;

Figure 3 is a perspective of the wall slab engaging bracket;

Figure 4 s a perspective of the metallic plate which is connected to theupper end of the strut and together with the horizontal pivot elementserves tiltably to connect the upper end of the strut to the wall slabengaging bracket;

Figure 5 is an enlarged transverse section taken on the line 55 ofFigure 2;

Figure 6 is a fragmentary plan view of the brace, certain parts of theaforementioned metallic plate and the wall slab engaging bracket beingshown in section for purposes of illustration;

Figure '7 is a perspective of the floor slab engaging bracket of thebrace;

Figure 8 is a perspective of the elongated. externally threaded elementconstituting a part of the means for eifecting longitudinal adjustmentof the brace; and

Figure 9 is a perspective of the tiltable collar and the two wing nuts.

The adjustable brace that is illustrated in the drawings constitutes thepreferred form or embodiment of the invention. it is adapted for use inconnection with a fi-OOZ' slab iii and a wall slab ii and serves, asdescribed hereafter more in detail, to hold the wall slab ii in anupright position next to the floor slab While it is being secured inplace in connection with the construction or formation of a concretebuilding. The fioor slab i9 is shown as resting on a fill or foundationl2 at the site where the building is to be erected. It is contemplatedthat in connection with fabrication of the building a rectangularhorizontally extending frame (not shown) will be placed on the fill i2.After the frame is suitably secured or anchored in place concrete inplastic form is poured into the bot-- tom portion of the frame interiorin order to form the floor slab iii. After pouring of the concrete forsuch slab a film or layer of nonadhesive material is applied to the topsurface of the concrete. Thereafter concrete is poured into the upperportion of the frame interior in order to form the wall slab ll.Directly after pouring the concrete for the wall slab four bracket-likeattaching members i3 are embedded in the corner portions of the-uppersurface of the wall slab. After hardening or setting of the concrete forthe two slabs the wall slab is connected by way or a harness i i to acable supported hook equipped block 55 on a crane or other hoistingmechanism (not shown). As shown in Figure l, the harness it comprises arigid horizontally extending harness member is and a pair of dependingcables ll at the ends of the member. The harness member it is providedwith a cable arrangement 53 whereby it is connected to the hook on theblock it The central portions of the cables ll extend around dependingsheaves is on the ends of the harness member 56 and the ends of suchcables are provided with eye-bolts or clevises 20 whereby they may beconnected to the bracket-like attaching mem bers IS on the cornerportions of the wall slab l After the wall slab l l is attached to thehook equipped block it by the hardness i l it is first lifted by theaforementioned crane or other hoisting mechanism and then tilted into asubstantially vertical position. After the tilting operation the wallslab is manipulated so as to position its bottom marginal portion inabutting relation with one of the side marginal portions of the floorslab, as shown in Figure l of the drawings. The wall slab H is providedwith an anchoring device 2i and the floor slab it: is pro- Vided with ananchoring device 22. The anchoring device 2! comprises a nut-like member23 and a lag screw 24 and is located at the upper portion or the wallslab when the latter is in its wall forming position. The nut-likemember 23 is in the form of a wire helix. It is embedded in the wallslab directly inwards of the latters inner surface and embodies aplurality of L- shaped heavy wire legs 25 whereby it is maintained infirmly interlocked. relation with the concrete in which it is embedded.The lag screw 2 is arranged so that the threaded shank thereof is inscrew threaded relation with the interior of the nutlike member 23 andits head is disposed a small distance away from the inner surface of thewall slab ii. It is contemplated that the nut-like member 23 of theanchoring device 2! will be embedded in the wall slab at the time theconcrete for the latter is poured and that the lag screw E l will beconnected to the nut-like member 23 after the wall slab is manipulatedinto its upstanding position as hereinbefore described. The anchoringdevice 22 comprises a nut-like member 26 and a lag screw 27 and islocated at the central portion of the floor slab iii and insubstantially the same vertical plane as the anchoring device ft. Thenut-like member 26 is in the form of a wire helix. It is embedded in thefloor slab directly beneath the top surface thereof and embodies aplurality of irregularly shaped heavy wire legs 28 whereby it ismaintained in firmly interlocked relation with the concrete in which itis embedded. The lag screw 2'! is arranged so that the threaded shankthereof is in screw threaded relation with the interior of the nut likemember 26 and its head is disposed a small distance above the topsurface of the floor slab it. It is contemplated that the nutlike member26 of the anchoring device 22 will be embedded in the floor slab at thetime the concrete for the latter is poured and that the lag screw 2?will be connected to the nut-like member 2s after the Wall slab l l ismanipulated into its upstanding position.

The brace is of unitary character and as its main components or partscomprises a wall slab engaging bracket 29, a floor slab engaging bracket3i an inclined or diagonally disposed strut 3i between the two bracketsand an adjustable connection 32 between the bracket 36 and the lower endof the strut 3 I.

The wall slab engaging bracket 29 is formed of steel or other suitablemetal and comprises a flat rectangular vertically extending part 33 anda flat rectangular vertically extending part 34 at right angles to thepart 33. The last mentioned part is adapted to fit flatly against theinner surface of the Wall slab ii and has in the upper portion of oneside margin thereof a horizontally extending notch 35 for receiving thehead-equipped end of the shank of the lag screw 2- 3, as best shown inFigure 6. The part 34. of the bracket 25 is connected to, and formedintegrally with, the other side margin of the part 33. It projects awayfrom the wall slab when the bracket 29 is in its operative position andembodies in its lower portion a hole 35. The latter, as shown in Figures2 and 3, is disposed beneath the notch 35 in the bracket part 33. Inconnection with use of the brace after the wall slab is initiallymanipulated into place by the crane or other hoisting mechanism, the lagscrew 24 of the anchoring device 2! is turned so as to shift it outwardsto a limited extent with respect to the nutlike member 23. Thereafterthe part 33 of the bracket 29 is placed against the inner surface of thewall slab H and is slid laterally until the head-equipped end of theshank of the lag screw 24 is seated in the notch 35. Thereafter the lagscrew 24 is tightened until the bracket 29 is firmly clamped against theinner surface of the wall slab. The anchoring device 2| constitutesmeans for detachably clamping or securing the bracket 29 against theinner surface of the wall slab.

The floor slab engaging bracket 35} is formed of steel or other suitablemetal and consists of a rectangular bottom member 37, a pair of spacedapart upwardly inclined side members 38 at opposite sides of the bottommember, and a collar 39. The bottom member 3i is of plate-like characterand is adapted when in its operative position and viewed from above toextend at right angles to the wall slab l I and has in the end portionthereof that is nearer to the wall slab a laterally extending notch 40for receiving the head-equipped end of the lag screw 21 of the anchoringdevice 22. In connection with use of the brace the lag screw 2'! isloosened to a small extent and then the bottom member 31 of the bracket38, after being placed on the top surface of the floor slab Hi, ismanipulated and shifted laterally in order to bring the head-equippedend of the lag screw 27 into seated relation with the notch 4U.Thereafter the lag screw is tightened in order firmly to clamp thebottom member 31 of the bracket 30 against the top surface of the floorslab. The anchoring device 22 constitutes means for detachably securingor clamping the bracket 39 to the top surface of the floor slab. Thespaced apart side members 38 of the floor slab engaging bracket 39 areof strip-like character and are up wardly inclined in a direction awayfrom the wall slab engaging bracket 29. The lower ends of the sidemembers fit against, and are welded to, the end portions of the sideedges of the bottom memher 3'! that are remote from the laterallyextending notch 4d. The upper ends of the side mam here 38 are providedwith aligned or coaxial transversely extending holes ll. The collar 35-3is disposed between the upper ends of the side members 38 and embodiesat the sides thereof integral outwardly extending coaxial trunnions 42which are journalled in the holes ll and support the collar so that itis capable of tilting back and forth about a horizontal axis.

The strut 3| is upwardly inclined in the direcion of the wall slab H thebrace is in its operative position and comprises a pair of coextensiveside by side but laterally spaced wooden bars Q3. The latter arepreferably in the form of 2 x 4s and are maintained in spaced apartrelation by way of a series of equidistantly spaced wooden spacer strips4'4 between the central portions of the inner or opposed side surfacesof the bars. Horizontally extending nut equipped l-OItS 45 extendthrough aligned transverse holes 46 in the bars 43 and serve to hold thebars in connected relation. In addition to the wooden bars 53 the strut3| comprises an elongated metal- 118 plate 41. One end portion of thisplate fits between the upper ends of the bars 43 and is secured in placeby way of the two uppermost bolts 45. The central portions of the shanksof such bolts extend through holes 48 in said one end portion of theplate 4?. The other end portion of the plate projects beyond the endsurfaces of the bars 43, fits against the lower portion of the part 34of the wall slab engaging bracket 29 and is provided with a transversecircular hole 49 which is the same in size as, and registers with, thehole 36 in the bracket part 34. A pivot element 50 extends through theholes 36 and 49 and serves so to connect the bracket 29 and the upperend of the strut as to permit the latter to tilt relatively to oneanother in a vertical plane. Preferably the pivot element 50 is in theform of a rivet in order that it remains permanently in place. The endportion of the plate 41 that is clamped between the upper nds of thewooden bars 43 of the strut has the bottom edge thereof welded to thecentral portion of a transversely extending metallic strip 5|. As shownin Figure 5, the end portions of the strip 5| underlie the upper ends ofthe bars 43. Two nut equipped bolts 52 extend through holes 53 in theupper ends of the bars 43 and holes 54 in the end portions of the strip5| and serve to hold said upper ends of the bars and the end portions ofthe strip in clamped relation.

The adjustable connection 32 of the brace com prises an elongatedexternally threaded element 55 and a pair of wing nuts 56 and 51. Theelement 55 is preferably in the form of a metallic tube and is connectedto the lower end of the strut 3| by a metallic plate structure 58. It isdisposed in parallel relation with the strut and. extends slidablythrough the tiltable collar 39. The metallic plate structure 58 is ofunitary character and consists of a transversely extending plate 59, alongitudinally extending plate 5E and a transversely extending plate 6|.The The transversely extending plate 59 is welded to the upper end ofthe externally threaded element 55 and abuts directly against the lowerend surfaces of the wooden bars 43. The longitudinally extending plate60 fits between the lower ends of the bars 43 and has the lower endpor-- tion thereof welded to the central portion of the transverselyextending plate 59. The two lowermost bolts 45 extend through holes 62in the longitudinally extending plate to and serve to hold the platestructure 58 in connected relation with the lower ends of the wooden.bars 43. The transversely extending plate 6| underlies the lower ends ofthe bars 43 and has its central portion Welded to the central portion ofthe lower edge of the longitudinally extending plate 69. Nut equippedbolts $3 extend through holes 66 in the lower ends of the bars 43 andholes 55 in the end portions of the transversely extending plate El andcoast with the two lowermost bolts 45 fixedly to connect the platestructure 58 to the lower end of the strut 3|, The wing nuts 55 and 51are mounted rotatably on the externally threaded element 55 and arepositioned at opposite sides of the tiltable collar 39. The nut 58located on the upper side of the collar and consists of a wire helix 66and four L-shaped wings 57. The wings 5'! are disposed apart. They arepreferably formed of metallic rods and cor1- sist of parts 58 and rightanglehandle forming parts 69. The parts 63 of the wings extendlengthwise of the wire helix 66 and are welded to the outer peripherythereof. The right angle handle forming parts 69 are connected to, andextend outwards from, the upper ends of the parts 68. The innerperiphery of the wire helix 66 forms an internal screw thread which isin threaded relation with the external screw thread on the elongatedelement When the wing nut 56 is turned so that it feeds downwards withrespect to the element 55 it operates to slide the strut 3| upwards in adirection lengthwise of the strut. The nut 51 is located on the lowerside of the collar 3% and consists of a wire helix l8 and four L-shapedwings ll. The wings ii are disposed 90 apart. They are preferably formedof metallic rods and consist of parts 12 and right angle handle formingparts it. The parts #2 of the wings Tl extend lengthwise of the wirehelix ill and are welded to the outer periphery thereof. The right anglehandle forming parts it are connected to, and extend out wards from, thelower ends of the parts 12. The inner periphery of the wire helix iiiforms an internal screw thread which is in threaded rela" tion with theexternal screw thread on the elongated element 55. When the wing nut Elis turned so that it feeds upwards with respect to the element 55 itoperates to slide the strut 3i downwards in a direction lengthwise ofthe strut.

When, after manipulation of the wall slab H into the position shown inFigure l of the draw ings, it is desired to use the brace the bracket 29is connected to the anchoring device 2i and the bracket 3!) is connectedto the anchoring device 22 as heretofore described. As soon as the lagscrews 24 and 2? are tightened the brace holds the wall slab H in fixedrelation with the door slab it. If it is desired, as a preliminary topermanently securing the wall slab in place, to tilt the wall slaboutwards, the wing nut is first loosened and thereafter the wing nut 56is turned so as to feed it downward with respect to the externallythreaded element 55. Such turning movement on the part of the wing nutit results in the strut 3| sliding upwards and effecting outward tiltingof the wall slab. As

soon as the wall slab is tilted outwards to the desired extent the wingnut 5? is tightened against the lower side of the collar 39 in orderpositively but releasably to lock the strut in place. In the event it isdesired to tilt or swing the wall slab inwards the wing nut 55 isloosened and the wing nut til is turned in such direction as to cause itto feed upwards with respect to the externally threaded element 55. Suchturning movement on the part of the wing nut ii'i results in the strut3i sliding downwards and eifecting inward tilting of the wall slab. Assoon as the wall slab is tilted inwards to the desired extent the wingnut 55 is tightened against the upper side of the collar 39 so that itserves with the wing nut 5'5 securely but releasably to lock the strutagainst longitudinal displacement or movement. In connection withsliding movement of the strut by turning of the wing nuts the pivotelement lit permits the upper end of the strut to tiit relatively to thewall slab engaging bracket and the collar 39 permits the lower end ofthe strut to tilt vertically relatively to the floor slab engagingbracket iii.

The herein described adjustable brace effectively and efficientlyfulfills its intended purpose and, due to its particular construction,may be fabricated or produced at a comparatively low cost. It is bothstrong and durable and may be adjusted with facility due to the specificconstruction and design of the adjustable connection 32 consisting ofthe elongated externally threaded element 55 and the wing nuts 56 and5?.

The invention is not to be understood as restricted to the details setforth since these may be modified within the scope of the appendedclaims without departing from the spirit and scope of the invention.

Having thus described the invention what I claim as new and desire tosecure by Letters Patent is:

1. As a new article of manufacture, an adjustable brace adapted, after awall slab is placed next to a fioor slab in connection with theconstruction of a concrete building, to hold the wall slab in positionwhile it is being secured in place and comprising a first bracketprovided with means for detachably securing it to the inner surface ofthe wall slab at a location above the floor slab, a second bracketprovided with means for detachably securing it to the top surface of thedoor slab at a location away from the wall slab and embodying a collarmounted to tilt freely about a horizontal axis, a rigid upwardlyinclined strut having horizontal pivot means between its upper end andthe first bracket whereby it and said first bracket are free to tiltrelatively to one another in a vertical plane, and an adjustableconnection extending between the second bracket and the lower end of thestrut and consisting of an elongated upwardly inclined externallythreaded element extending through the collar, disposed in parallelrelation with the strut, and having the upper end thereof connectedfixedly to the lower end of the strut, and nut means mounted rotatablyon the element and arranged in coacting relation with the collar, saidconnection being adapted when the nut means is turned in one directionso to coact with the collar as positively to slide the element and strutlongitudinally in one direction with respect to the second bracket andwhen the nut means is turned in the opposite direction so to coast withsaid collar as positively to slide the element and strut longitudinallyin the opposite direction with respect to said second bracket.

2. As a new article of manufacture, an adjustable brace adapted, after awall slab is placed next to a floor slab in connection with the construction of a concrete building, to hold the wall slab in positionwhile it is being secured in place and comprising a first bracketprovided with means for detachably securing it to the inner surface ofthe wall slab at a location above the door slab, a second bracketprovided with means for detachably securing it to the top surface of thefloor slab at a location away from the wall slab and embodying a collarmounted to tilt freely about a horizontal axis, a straight rigidupwardly inclined strut having horizontal pivot means between its upperend and the first bracket whereby it and said first bracket are free totilt relatively to one another in a vertical plane, and an adjustableconnection extending between the second bracket and the lower end of thestrut and consisting of an elongated upwardly inclined externallythreaded element extending slidably through the collar, disposed inparallel relation with the strut, and having the upper end thereofconnected fixedly to the lower end of the strut, and a pair of wing nutsmounted rotatably on the element and disposed on opposite sides of thecollar, said connection being adapted when one of the nuts is tightenedagainst the collar after loosening of the other nut positively to slidethe element and strut 1ongitudinally in one direction with respect tothe second bracket and when the other nut is tightened against thecollar after loosening of said one nut positively to slide the elementand strut longitudinally in the opposite direction with respect to saidcollar.

3. As a new article of manufacture, an adjustable brace adapted, after awall slab is placed next to a floor slab in connection with theconstruction of a concrete building, to hold the wall slab in positionwhile it is being secured in place and comprising a first bracketprovided with means for detachably securing it to the inner surface ofthe wall slab at a location above the floor slab, a second bracketprovided with means for detachably securing it to the top surface of thefloor slab at a location away from the wall slab and consisting of abottom member, a pair of spaced apart upwardly extending side memberswith aligned holes at their upper ends and a collar disposed between theside members and having at the sides thereof horizontal trunnionsjournalled in said holes and serving to support the collar so that it isfree to tilt about a horizontal axis, a rigid upwardly inclined struthaving horizontal pivot means between its upper end and the firstbracket whereby it and said first bracket are free to tilt relatively toone another in a vertical plane, and an adjustable connection extendingbetween the second bracket and the lower end of the strut and consistingof an elongated upwardly inclined externally threaded element extendingthrough the collar, disposed in parallel relation with the strut andhaving the upper end thereof connected fixedly to the lower end of saidstrut, and nut means mounted rotatably on the element and arranged incoacting relation with the collar, said connection being adapted whenthe nut means is turned in one direction so to coact with the collar aspositively to slide the element and strut longitudinally in onedirection with respect to the second bracket and when the nut means isturned in the opposite direction so to coact with the collar aspositively to slide the element and strut longitudinally in the oppositedirection with respect to said second bracket.

4. As a new article of manufacture, an adjustable brace adapted, after awall slab is placed next to a floor slab in connection with theconstruction of a concrete building, to hold the wall slab in positionwhil it is being secured in place and comprising a first bracketprovided with means for detachably securing it to the inner surface ofthe wall slab at a location above the floor slab, a second bracketprovided with means for detachably securing it to the top surface of thefloor slab at a location away from the wall slab and consisting of abottom member, a pair of spaced apart upwardly extending side memberswith aligned holes at their upper ends and a collar disposed between theside members and having at the sides thereof horizontal trunnionsjournalled in said holes and serving to support the collar so that it isfree to tilt about a horizontal axis, a rigid upwardly inclined struthaving horizontal pivot means between its upper end and the firstbracket whereby it and said first bracket are free to tilt relatively toone another in a vertical plane, and an adjustable connection extendingbetween the second bracket and the lower end of the strut, consisting ofan elongated upwardly inclined externally threaded element extendingslidably through the collar, disposed in parallel relation with thestrut, and having the upper end thereof connected fixedly to the lowerend of the strut, and a pair of wing nuts mounted rotatably on theelement, disposed on opposite sides of the collar and consisting of wirehelixes and L-shaped wings fixed to the other peripheries of thehelixes, said connection being adapted'when one of the nuts is tightenedagainst the collar after loosening of the other nut positively to slidethe element and strut longitudinally in one direction with respect tothe second bracket and when the other nut is tightened against thecollar after loosening of said one nut positively to slide the elementand strut longitudinally in the opposite direction with respect to saidsecond bracket.

5. As a new article of manufacture, an. adjustable brace adapted, aftera wall slab is placed next to a floor slab in connection with theconstruction of a concrete building, to hold the wall slab in positionwhile it is being secured in place and comprising a first bracketprovided with for detachably securing it to the inner surface of thewall slab at a location above the floor slab, and embodying a partextending inwards at right angles to the wall slab, a second bracketprovided with means for detachably securing it to the top surface of thefloor slab at a location away from the wall slab and embodying a collarmounted to tilt freely about a horizontal axis, a rigid upwardlyinclined strut comprising a pair of side by side spaced apart bars andan elongated plate having one end portion thereof clamped between theupper ends of the bars and its other end portion projecting thereabove,a horizontal pivot element extending transversely through said part ofthe first bracket and said other end portion of the plate and forming apivotal connection whereby said first bracket and the upper end of thestrut are permitted to tilt relatively to one another in a verticalplane, and an adjustable connection extending between the second bracketand the lower end of the strut, consisting of an elon gated upwardlyinclined externally threaded ele ment extending through the collardisposed in parallel relation with the strut and having the upper endthereof connected fixedly to the lower end of the strut, and nut meansmounted rotatably on the element and arranged in coacting relation withthe collar said connection being adapted when the nut means is turned inone direction so to coact with the collar as positively to slide theelement and strut longitudinally in one direction with respect to thesecond bracket and when the nut means is turned in the oppositedirection so to coact with said collar as positively to slide theelement and strut longitudinally in the opposite direction with respectto said second bracket.

6. As a new article of manufacture, an adjustable brace adapted, after awall slab is placed next to a floor slab in connection with theconstruction of a concrete building, to hold the wall slab in positionwhile it is being secured in place and comprising a first bracketprovided with means for detachably securing it to the inner surface ofthe wall slab at a location above the floor slab, a second bracketprovided with means for detachably securing it to the top surface of thefloor slab at a location away from the wall slab and embodying a collarmounted to tilt freely about a horizontal axis, a rigid upwardlyinclined strut having horizontal pivot means between its upper end andthe first bracket whereby it and said first bracket are fre to tiltrelatively to one another in a vertical plane and comprising a pair ofside by side spaced apart bars, and an adjustable connection extendingbetween the second bracket and the lower end of the strut, consisting ofan elongated upwardly inclined externally threaded element extendingthrough the collar and provided at its upper end with a longitudinallyextending plate fitting between, and in clamped relation with, the lowerends of the bars, and nut means mounted rotatably on the element andarranged in coacting relation with the collar, said connection beingadapted when the nut means is turned in one direction so to coact withthe collar as positively to slide the element and strut longitudinallyin one direction with respect to the second bracket and when the nutmeans is turned in the opposite direction so to coact with the collar aspositively to slide the element and strut longitudinally in the oppositedirection with respect to said second bracket.

7. As a new article of manufacture, an adjustable brace adapted, after awall slab is placed next to a floor slab in connection with theconstruction of a concrete building, to hold the wall slab in positionwhile it is being secured in place and comprising a first bracketprovided with means for detachably securing it to the inner surface ofthe wall slab at a location above the fioor slab and embodying a partextending inwards at right angles to the wall slab, a second bracketprovided with means for detachably securing it to the top surface of thefloor slab at a location away from the wall slab and embodying a collarmounted to tilt freely about a horizontal axis, a rigid upwardlyextending strut comprising a pair of side by side spaced apart bars andan elongated plate having one end portion thereof clamped between theupper ends of the bars and its other end projecting therebeyond, ahorizontal pivot element extending transversely through said part of thefirst bracket and said other end portion of the plate and forming apivotal connection whereby said first bracket and the upper end of thestrut are permitted to tilt relatively to one another in a verticalplane, and an adjustable connection extending between the second bracketand the lower end of the strut and consisting of an elongated upwardlyinclined externally threaded element extending through the collar,disposed in parallel relation with the strut, and provided at its upperend with a longitudinally extending plate fitting between, and inclamped relation with, the lower ends of the bars, and nut means mountedrotatably on the element and arranged in coacting relation with thecollar, said adjustable connection being adapted when the nut means isturned in one direction so to coact with the collar as positively toslide the element and strut longitudinally in one direction with respectto the second bracket and when the nut means is turned in the otherdirection so to coact with said collar as positively to slide theelement and strut longitudinally in the opposite direction with respectto said second bracket.

8. As a new article of manufacture, an adjustable brace adapted, after awall slab is placed next to a iioor slab in connection with theconstruction of a concrete building, to hold the wall slab in positionwhile it is being secured in place and comprising a first bracketprovided with means for detachably securing it to the inner surface ofthe wall slab at a location above the floor slab and embodying a partextending inwards at right angles to the wall slab, a second bracketprovided with means for detachably securing it to the top surface of thefloor slab at a location away from the wall slab and consisting of afloor slab engaging bottom member, a pair of spaced apart upwardlyextending side members with aligned holes in their upper ends and acollar disposed between the side members and having at the sides thereofhorizontal trunnions journalled in said holes and serving to support thecollar so that it is free to tilt about a horizontal axis, a straightrigid upwardly inclined strut comprising a pair of side by side spacedapart bars and an elongated plate having one end portion thereof clampedbetween the upper ends of the bars and its other end portion projectingtherebeyond, a horizontal pivot element extending transversely throughsaid part of the first bracket and said other end portion of the plateand forming a pivotal connection whereby said first bracket and theupper end of the strut are permitted to tilt relatively to one anotherin a vertical plane, and an adjustable connection extending between thesecond bracket and the lower end of the strut and consisting of anelongated upwardly inclined externally threaded tubular elementextending slidably through the collar and provided at its upper end witha fixed longitudinally extending plate fitting between, and in clampedrelation with, the lower ends of the bars, and a pair of wing nutsmounted rotatably on the element, disposed on opposite sides of thecollar and con sisting of wire helixes and L-shaped wings fixed to theouter peripheries of the helixes, said adjustable connection beingadapted when one of the nuts is tightened against the collar afterloosening of the other nut positively to slide the element and strutlongitudinally in one direction with respect to the second bracket andwhen the other nut is tightened against the collar after loosening ofsaid one nut positively to slide the element and strut longitudinally inthe opposite direction with respect to said second bracket.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 578,594 Bond Mar. 9, 1897 2,259,378 Heidkamper Oct. 14, 19412,388,308 Court Nov. 6, 1945 2,436,799 Frost Mar. 2, 1948'

